diff options
Diffstat (limited to 'Projects/P-NUCLEO-WB55.Nucleo/Applications/BLE/BLE_HeartRateFreeRTOS/Core/Src/freertos_port.c')
| -rw-r--r-- | Projects/P-NUCLEO-WB55.Nucleo/Applications/BLE/BLE_HeartRateFreeRTOS/Core/Src/freertos_port.c | 98 |
1 files changed, 47 insertions, 51 deletions
diff --git a/Projects/P-NUCLEO-WB55.Nucleo/Applications/BLE/BLE_HeartRateFreeRTOS/Core/Src/freertos_port.c b/Projects/P-NUCLEO-WB55.Nucleo/Applications/BLE/BLE_HeartRateFreeRTOS/Core/Src/freertos_port.c index b203861fe..e96637686 100644 --- a/Projects/P-NUCLEO-WB55.Nucleo/Applications/BLE/BLE_HeartRateFreeRTOS/Core/Src/freertos_port.c +++ b/Projects/P-NUCLEO-WB55.Nucleo/Applications/BLE/BLE_HeartRateFreeRTOS/Core/Src/freertos_port.c @@ -18,6 +18,7 @@ ****************************************************************************** */ /* USER CODE END Header */ + /* Includes ------------------------------------------------------------------*/ #include "app_common.h" @@ -28,6 +29,7 @@ /* Private typedef -----------------------------------------------------------*/ typedef struct { + uint64_t LpTimeDiffVal; uint32_t LpTimeLeftOnEntry; uint8_t LpTimerFreeRTOS_Id; } LpTimerContext_t; @@ -58,18 +60,21 @@ typedef struct /* * The number of SysTick increments that make up one tick period. */ +#if ( CFG_LPM_SUPPORTED != 0) static uint32_t ulTimerCountsForOneTick; static LpTimerContext_t LpTimerContext; - +#endif /* Global variables ----------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ +#if ( CFG_LPM_SUPPORTED != 0) static void LpTimerInit( void ); static void LpTimerCb( void ); static void LpTimerStart( uint32_t time_to_sleep ); static void LpEnter( void ); static uint32_t LpGetElapsedTime( void ); void vPortSetupTimerInterrupt( void ); +#endif /* Functions Definition ------------------------------------------------------*/ @@ -167,6 +172,7 @@ void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime ) * sleep mode, it is easier and simpler to go with a low power timer as soon as the tick need to be * suppressed. */ +#if ( CFG_LPM_SUPPORTED != 0) void vPortSetupTimerInterrupt( void ) { LpTimerInit( ); @@ -182,6 +188,7 @@ void vPortSetupTimerInterrupt( void ) portNVIC_SYSTICK_LOAD_REG = ( configSYSTICK_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL; portNVIC_SYSTICK_CTRL_REG = ( portNVIC_SYSTICK_CLK_BIT | portNVIC_SYSTICK_INT_BIT | portNVIC_SYSTICK_ENABLE_BIT ); } +#endif /** * @brief The current implementation uses the hw_timerserver to provide a low power timer @@ -190,12 +197,15 @@ void vPortSetupTimerInterrupt( void ) * @param None * @retval None */ +#if ( CFG_LPM_SUPPORTED != 0) static void LpTimerInit( void ) { ( void ) HW_TS_Create(CFG_TIM_PROC_ID_ISR, &(LpTimerContext.LpTimerFreeRTOS_Id), hw_ts_SingleShot, LpTimerCb); + LpTimerContext.LpTimeDiffVal = 0; return; } +#endif /** * @brief Low power timer callback @@ -203,6 +213,7 @@ static void LpTimerInit( void ) * @param None * @retval None */ +#if ( CFG_LPM_SUPPORTED != 0) static void LpTimerCb( void ) { /** @@ -211,6 +222,7 @@ static void LpTimerCb( void ) return; } +#endif /** * @brief Request to start a low power timer ( running is stop mode ) @@ -218,53 +230,17 @@ static void LpTimerCb( void ) * @param time_to_sleep : Number of FreeRTOS ticks * @retval None */ +#if ( CFG_LPM_SUPPORTED != 0) static void LpTimerStart( uint32_t time_to_sleep ) { + uint64_t time; + /* Converts the number of FreeRTOS ticks into hw timer tick */ - if(time_to_sleep <= 0x10C6) - { - /** - * ( time_to_sleep * 1000 * 1000 ) fit a 32bits word - */ - time_to_sleep = (time_to_sleep * 1000 * 1000 ); - time_to_sleep = time_to_sleep / ( CFG_TS_TICK_VAL * configTICK_RATE_HZ ); - } - else if(time_to_sleep <= 0x418937) - { - /** - * ( time_to_sleep * 1000 ) fit a 32bits word - */ - time_to_sleep = (time_to_sleep * 1000); - time_to_sleep = time_to_sleep / ( CFG_TS_TICK_VAL * configTICK_RATE_HZ ); - if(time_to_sleep <= 0x418937) - { - /** - * ( time_to_sleep * 1000 ) fit a 32bits word - */ - time_to_sleep = (time_to_sleep * 1000); - } - else - { - time_to_sleep = (~0); /* Max value */ - } - } - else - { - time_to_sleep = time_to_sleep / ( CFG_TS_TICK_VAL * configTICK_RATE_HZ ); - if(time_to_sleep <= 0x10C6) - { - /** - * ( time_to_sleep * 1000 * 1000 ) fit a 32bits word - */ - time_to_sleep = (time_to_sleep * 1000 * 1000 ); - } - else - { - time_to_sleep = (~0); /* Max value */ - } - } - HW_TS_Start(LpTimerContext.LpTimerFreeRTOS_Id, time_to_sleep); + time = (time_to_sleep * 1000 * 1000 ); + time = time / ( CFG_TS_TICK_VAL * configTICK_RATE_HZ ); + + HW_TS_Start(LpTimerContext.LpTimerFreeRTOS_Id, (uint32_t)time); /** * There might be other timers already running in the timer server that may elapse @@ -276,6 +252,7 @@ static void LpTimerStart( uint32_t time_to_sleep ) return; } +#endif /** * @brief Enter low power mode @@ -283,6 +260,7 @@ static void LpTimerStart( uint32_t time_to_sleep ) * @param None * @retval None */ +#if ( CFG_LPM_SUPPORTED != 0) static void LpEnter( void ) { #if ( CFG_LPM_SUPPORTED == 1) @@ -290,6 +268,7 @@ static void LpEnter( void ) #endif return; } +#endif /** * @brief Read how long the tick has been suppressed @@ -297,21 +276,37 @@ static void LpEnter( void ) * @param None * @retval The number of tick rate (FreeRTOS tick) */ +#if ( CFG_LPM_SUPPORTED != 0) static uint32_t LpGetElapsedTime( void ) { - uint64_t val_ticks, time_us; + uint64_t val_ticks, time_us, diff_ps; + uint32_t LpTimeLeftOnExit; - time_us = (CFG_TS_TICK_VAL) * (uint64_t)(LpTimerContext.LpTimeLeftOnEntry - HW_TS_RTC_ReadLeftTicksToCount( )); + LpTimeLeftOnExit = HW_TS_RTC_ReadLeftTicksToCount(); + time_us = (CFG_TS_TICK_VAL) * (uint64_t)(LpTimerContext.LpTimeLeftOnEntry - LpTimeLeftOnExit); - val_ticks = time_us * configTICK_RATE_HZ; - val_ticks = val_ticks / (1000 * 1000); + /* Corrects the time precision lost in CFG_TS_TICK_VAL computation */ + + /* Compute the amount of pico seconds lost at each TS ticks */ + diff_ps = DIVR( ((uint64_t)CFG_RTCCLK_DIV * 1000000 * 1000000), (uint64_t)LSE_VALUE ); + diff_ps -= DIVF( (CFG_RTCCLK_DIV * 1000000), LSE_VALUE ) * 1000000; + /* Compute the total amount of time shift */ + diff_ps *= (uint64_t)(LpTimerContext.LpTimeLeftOnEntry - LpTimeLeftOnExit); - /* add a tick if the time elapsed is above 50 % of a tick */ - if( (time_us % (portTICK_PERIOD_MS * 1000) > (portTICK_PERIOD_MS * 1000 / 2)) ) + /* Save the time shift for next time */ + LpTimerContext.LpTimeDiffVal += diff_ps; + + while(LpTimerContext.LpTimeDiffVal >= (uint64_t)(1000 * 1000)) { - val_ticks++; + /* Reports the time difference into returned time elapsed value */ + time_us++; + LpTimerContext.LpTimeDiffVal -= (uint64_t)(1000 * 1000); } + /* Convert uS time into OS ticks */ + val_ticks = time_us * configTICK_RATE_HZ; + val_ticks = val_ticks / (1000 * 1000); + /** * The system may have been out from another reason than the timer * Stop the timer after the elapsed time is calculated other wise, HW_TS_RTC_ReadLeftTicksToCount() @@ -322,5 +317,6 @@ static uint32_t LpGetElapsedTime( void ) return (uint32_t)val_ticks; } +#endif /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |